class_docstr: NameManager to do automatic naming.
  
  Developers can also inherit from this class to change naming behavior.
code: def __init__(self):
      self._counter = {}
      self._old_manager = None
  
file_path: mxnet/python/mxnet/name.py
imports: import contextvars
label_desc: Use image node_id 1 to create a new NameManager object  with example: obj = NameManager()